From one of my previous posts:
I have found an alternative that works like a charm for under $10 and is as close as your nearest Home Depot!
In the plumbing section of Home Depot there is a tool made by Brass Craft (Model T143) that is called an "internal Pipe Wrench" for removing 1/2 inch pipe nipples. The main shaft of the tool fits perfectly in the ZF plug and can be used with a regular open-ended wrench, or cut off and used with a socket.
But keeping on-topic... aren't they supposed to leak?
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